Door-lock.



I No. 880,052. PATENTED FEB. 25, 1908.

W. H. THUMAS.

DOOR LOCK.

APPLIoATIoN FILED JAN.16. 190e.

2 SHEETS-SHEET 1.

No. 880,052. PATBNTED PEB. 25, 1908.

' W. H. THOMAS.

DOOR LOCK.

AIPLICATION FILED JAN. 16. 1906. 2 SHEETHBET 2' 1HE omis PETER: co., wAsHmcmN. n! r:4

WILLIAM H. THOMAS, OF WHITTIER, CALIFORNIA.

DOOR-LOCK.

Specification of Letters Patent.

Patented Feb. 25, 1908.

Application filed January 16. 1906. Serial No. 296266.

To all whom 'it may concern: l

Be it known that I, WILLIAM H. THOMAS, l a citizen of the United States, residing at I/Vhittier, in the county of Los Angeles and State of California, have invented new and useful Improvements in Door-Locks, of which the following is a specification.

The objects of my invention are to provide a lock which has means to prevent its being unlocked by any one on the outside; to provide a lock which has means to prevent the removal of the main inside key therefrom; to provide a lock in which the pass key alone will unlock the door from the outside dispensing with the use of the main key on the outside. I accomplish these objects by means ofthe device described herein and illustrated in the accompanying drawings in which Figure l-is an elevation of the inside escutcheon of the lock artly broken away, the main key and the s ank of the inner door knob being shown in section. Fig. 2-is a central vertical section of a lock embodying my invention. Fig. S-is a side elevation of the internal construction of the lock, the inside face of the lock casing removed. Fig. Ll-is a perspective view of a sleeve into which the shanks of the outer and the inner door knobs penetrate. Fig. 5-is a perspective view of a detachable corner of the casing of the lock adapting the lock for use on a door swinging to the right or left. Fig. -is a central vertical section of the lock cylinder G with the operative parts in section therein, showing a modified form thereof. Fig. 7-is a side elevation of the different parts in the cylinder in the modiiied form with the pass key for use therein. Fig. S-is a perspective view of the tumbler carrying barrel.

The lock herein described and shown in the accompanying drawings is an improvement on that lock described and shown in my application for United States patent filed in the United States Patent Oflice on the 15th of November 1905 and bearing Serial No. 287,490.

In the drawings A represents a fragment of the door and B the inner escutoheon of the lock in place thereon.

C is the outer escutcheon.

D is the casing of the lock.

E is the door latch bolt and F the locking or dead bolt.

When the locking bolt is thrown into the locked position the upwardly projecting lug F/ on the upper part thereof it will operate to lock the latch by virtue of its engagement with the downwardly projecting lug E on the latch and hold the same locked while the locking bolt remains in the locked position. This being a feature similar to that shown and described in mysaid pending application.

In this lock I have dispensed with the usual key hole on the outer side thereof for the insertion therein of the main key and substituted therefor on the outside of the lock a cylindrical casing G for the use therein of a flat or night key. This cylinder carries on its inner end a disk Z into which the end of the pass key t projects into a slot Z in the periphery thereof and causes the same to rotate upon the rotation of the pass key.

This disk has also a square socket (see Fig. 3)

Z into which thesquare end H of the stem of the main key H projects. The pass key when inserted for use is placed in the key receiving socket c in the key-cylinderf and passes partly through theA cylinder and the projecting end thereof will enter the recess Z/ inl the disk Z. The square shank on the main key, will enter into and remain in the square socket Z in the disk. the s uare end of the stem of the main key into t e square socket Z of the disk Z I' am enabled to operate the locking mechanism of theklock and thereby dispenseqwith an eXtra The main key H is provided with a flat stem and is prevented from rotating when desired by elevating the key-locking plate I which is slidably mounted on the inside of the inner door escutcheon B and has in the lower end thereof a narrow recess I shown in dotted lines in Fig. 1. This key-locking plate is elevated into locking engagement with the key by means of the plate-elevating arm Jy mounted on the square shank K of the inner door knob when the lug is in its upturned position as shown in Figs. l and 2. Upon the rotation of the inner door knob one half turn the plate-elevating lug will drop permitting the plate to dro removing the recess I in the plate below t e shank H of the key permitting the free rotation of the key in the lock. When the key-locking plate is in its elevated or locking position the door cannot be unlocked from either side by reason of the fact that the key cannot be turned nor can the outer cylinder lock be turned. The inner main key H cannot be removed By inserting i froml the .lock without the removal of the keysecuring split pin" L in the shank of the key as shown in Fig. 2. This provision is made to prevent the removal of the key from the lock as the lock cannot be used either from the inside or the outside while the key is not,

in place therein.

I have providedmeans whereby a person on the inside canprevent any one on the outside from unlocking the lock although he may have a pass key adapted for use in thel each terminating in the center thereof. This socket at its inner end is circular as at M for the insertion therein of the shank K of the inner door knob and square on the outer end as at M for the insertion thereinto of the square end of the shank N of the outer door knob. Onthe shank of the inner door knob I have provided a socket-engaging lug O adapted to engage the shoulder M on the revolution oi the shank K and carry the key locking plate I into its upper or locking position.

When the key locking plate is in its elevated or locking positionby reason of the plate.

elevating arm J being thrown upwardly, the outer knob cannot be turned nor can the door be unlocked even by one having the night key on the outside but by turning the inner knob one-half turn the lug O on the shank oit' the inner door knob will be depressed `ermitting the plate I to drop into the unocked position when the party having the night lock on the outside can unlock the door. By this arrangement I have provided means whereby the person on the inside can leave the lock in position so that it can be opened or not as the person on the inside/desires.

The latch E will be retracted on rotating the main key by means of the pivoted arm P, pivoted in the lower right hand corner of the lock7 as at P, see Fig. 3, as the web of the key will engage the bearing face of the pivoted arm P and throw it backwardly carrying with it the downwardly projecting end Q of the latch-operating lever Q. This lever is of ordinary construction eXce t as to the downwardly projecting end Q t ereof, which end contacts with the upper end of the pivoted arm P and is thrown backwardly with the pivoted arm on one hali turn of the key which at the same time withdraws the locking bolt into its unlocked position thus unlocking both the latch and the locking bolt at the same time, and on the reverse half turn of the key will lock both latch and bolt at the same l time.

The screw threaded tumblers 7L are secured in screw threaded openings in the tumbler barrel Z and byI screwing the same into the barrel to a greater or less depth a great number of changes in the form of key to be used within this lock may be secured.

The tumbler Rbeing of usual construction, held in its depressed or locking position as shown in Fig. 3 by the iiat spring S, has upon its u per edge the usual bolt engaging lug R w ich will prevent the movement of the locking bolt when the tumbler is in its depressed position as it contacts with the locking lug F on the upper part of the locking bolt when it is depressed. This tumbler is elevated out of engagement with the bolt on turning the key to move the bolt.

To provide means whereby my improved lock may be used upon a door hinged upon its right or left edge I have made the lock casing of the lower right hand corner of the lock removable so it can be turned side for side and I have shown the reversible corner in perspective detached from the lock in Fig. 5. This reversible corner is secured to the main casing by the holding screws T ywhich pass through apertures in the reversible corner and pass into screw threaded engagement with the lugs U on the casing of the lock. The key hole in the reversible corner being bifurcated adapting it for use on either a right or left hung door to further adopt my lock for use on right or left hung doors on the latch E I have provided a lug E which. eX- tends on both sides thereof for engagement with the lug Fl on the bolt F no matter which edge is up whereby the lock can be used on a door hung either way.

To prevent the removal of the lock from the outside I have provided screws V which hold the lock in place on the door in which there are no screw driver slots to receivethe end of the screw driver whereby the screws cannot be removed.

In Figs. 6"-7 and 8 of the drawings I have 'y shown a modification of the lock cylinder whereby the lock may be placed in doors of diiferent thicknesses. In this construction I have provided an adjustable extension sleeve W externally and internally threaded and means whereby the extension sleeve may be held in fixed relation to the outside barrel of the lock cylinder. The means shown in this instance consists of a number of screw threaded apertures arranged at diflerent intervals on the extension sleeve and a longidinal slot in the outside casing X of the lock cylinder through which passes a set screw Y which engages with one of the desired screw threaded apertures in the extension sleeve holding it vin fixed relation to the outside cylinder. By this means it will be seen that I obviate the necessity of manufacturing locks with cylinders of different lengths.

It is to be observed that the ivoted arm P constitutes `means indepen ent of the latch-bolt operating means for operating both the dead-bolt and the latch-bolt, and

that the key H when inserted acts as means to release the tumbler R R', and to move the dead-bolt from locked position. The lever P is also operable by said key meansto retract the latch-bolt; that is to say,-the web of the key comes into contact With the lever P and thereby Ietracts the latch-bolt at the same time that it operates to .unlock the dead-bolt. The pivoted lever P is slidably connected With the latch-bolt to retract the same through its engagement with the projecting end Q of the latch-bolt operating lever( Having described my invention what I claim as new and desire to secure by Letters Patent is 1. A door lock having means to work the locking mechanism from the outside by means of a pass key comprising a disk revolubly mounted in a cylinder carrying screw tumblers and having in the center of the inner end thereof a square socket for the reception of a square shank on the main key on t 1e inside of the lock and having on the periphery thereof a recess for the reception of the projecting end of the pass key.

2. The herein described means to operate a lock ofthe character herein described by means of a pass key comprising a cylindrical casing; a tumbler barrel therein; a key engaging disk revolubly mounted in the inner end of the cylindrical casing, the said disk having in its center a square socket; an aperture in the periphery thereof in combination with a pass key and a main key adapted to operate the lock.

3. The herein described means to operate a lock of the character herein described comprising the cylinder lock G having mounted therein a tumbler barrel Z having screw threaded openings therein for the reception of screw threaded tumblers h a disk Z rotatively mounted in the rear end thereof and having square apertures Z in the center thereof and a slot Z in the periphery thereof; a revoluble key cylinderfrotatively mounted in the tumbler barrel in combination with the main key H having a square projecting shank H on the end of the stem thereof adapted to be turned upon the rotation of the disk Z, substantially as herein shown and described.

4. The herein described means in a lock of the character herein described to adapt the lock for use on a door opening to the right or left comprising a latch E having a lug E 1 projecting on both sides thereof in oombination with a bolt having a shoulder F on the upper edge thereof and a removable casing having a bifurcated key opening therein and means to secure said removable casing to the casing of the lock substantially as herein shown and described.

5. In a lock of the 'character herein described the herein described means to operate both the latch E and the door bolt F comprising the pivoted lever P pivotally secured in the corner of the casing of the lock as at P and projecting upwardly into the path of the web of the main key and contacting therewith on the rotation of the main key in combination with a latch operating lever Q having a downwardly projecting extension Q thereon adapted to contact with the lever P substantially as herein shown and described.

6. A lock comprising a latch and dead bolt, a pivoted latch lever secured to the latch bolt, a4 tumbler for holding the dead bolt in locked or unlocked positions, an arm adapted to engage the end of the latch lever, and a key engaging the dead bolt and arm for moving the latch and dead bolts.

7. In a lock, the combination with a cylindrical casing, of a tumbler barrel, screw threaded tumblers therein, a key cylinder received in the tumbler barrel, a disk in the interior of the casing, and an extension sleeve adjustably connected to the cylinder casing.

8. In a lock, the combination with a cylindrical casing, of a tumbler barrel, a key cylinder received in the tumbler barrel, and

a disk in the interior of the casing, said disk having apertures for the reception of one form of key from one side of the door and another form of key from the other side.

9. A lock comprising a latch and dead bolt, said latch bolt being reversible, lugs on the latch bolt, a tumbler for holding the dead bolt in locked or unlocked position, a shoulder on the dead bolt adapted to engage a lug on the latch bolt, a pivoted arm engaging the latch bolt, and a key engaging the dead bolt and arm for operating the bolts in a single revolution.

In witness that I claim the foregoing I have hereunto subscribed my name this 8th day of January, 1906.

'WILLIAM I-I. THOMAS.

Witnesses:

HENRY T. HAZARD, G. E. HARPHAM. 

